Aqueous acid gels and use thereof
US4624795A · kind A · utility
32Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Mar 28, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/923
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Copolymers of a predominant proportion of an olefinically unsaturated sulfonic acid, an acrylamide, a vinyl phosphonic acid, and optionally other copolymerizable vinyl monomers, form aqueous acid gel compositions when added to the aqueous acid along with a gelling agent selected from titanium or zirconium compounds, and retarded gel destabilizing compounds containing fluoride, sulphate or phosphate anions, the apparent viscosity and time of stability of the acid gel composition being controlled by the addition of these essential ingredients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.